Double-chuck mechanical pencil

Abstract

A double-chuck mechanical pencil comprises a barrel, a barrel cap detachably attached to a front end of the barrel, a lead tank inserted in the barrel, a feed chuck for feeding leads, combined with the lead tank, a sleeve bolster disposed on the front side of the feed chuck, and a holding chuck combined with the sleeve bolster. A holding chuck unit including the holding chuck and the sleeve bolster, and a feed chuck unit including the feed chuck and a sleeve can come into contact with each other in the barrel cap.

What is claimed is:  
     
       1. A double-chuck mechanical pencil comprising: 
       a barrel;  
       a barrel cap detachably screwed on a front end of the barrel;  
       a lead tank inserted in the barrel so as to be operated for longitudinal sliding in the barrel;  
       a feed chuck fixed to a front end of the lead tank;  
       a chuck ring loosely put on the feed chuck;  
       a sleeve interposed between the barrel cap and the feed chuck;  
       a sleeve bolster in contact with a front end of the sleeve;  
       a holding chuck fixed to a front end of the sleeve;  
       a return spring interposed between the sleeve and the lead tank;  
       a tip spring interposed between the barrel cap and the sleeve; and  
       an intermediate connecting member having a front externally threaded part screwed in an internally threaded part of the barrel cap, and a back externally threaded part screwed in a front internally threaded part of the barrel.